CN1848665A - Three-switch type power converter - Google Patents
Three-switch type power converter Download PDFInfo
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- CN1848665A CN1848665A CNA200610039335XA CN200610039335A CN1848665A CN 1848665 A CN1848665 A CN 1848665A CN A200610039335X A CNA200610039335X A CN A200610039335XA CN 200610039335 A CN200610039335 A CN 200610039335A CN 1848665 A CN1848665 A CN 1848665A
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Abstract
A power converter of three switches type is prepared as series-connecting a controllable switching element between coils of two series connected motors, adding a diode separately between two end of said switching element and positive as well as negative electrodes of power supply and using it as auxiliary diode, connecting cathode of a diode to positive electrode of power supply and anode of it between motor coil and controllable switching element, connecting anode of another diode to negative electrode of power supply and cathode of it between motor coil and controllable switching element.
Description
One, technical field
The present invention relates to a kind of power inverter, relate in particular to a kind of power inverter that is applicable to switched reluctance motor.
Two, background technology
Simple in structure, the rotor of switched reluctance motor do not have winding, no permanent magnetism, stator only has concentrated winding, supporting switching circuit is also uncomplicated, has the efficient height, control is convenient, speed adjusting performance is excellent, good reliability, can be suitable for advantage such as adverse circumstances, is one of focus of present motor research.
In actual use, each phase current opsition dependent closed-loop control of switched reluctance motor keeps certain phase sequence and certain break-make moment, motor is rapidly to the power supply feedback energy during commutation, and the phase winding electric current decays to zero rapidly when finishing in the inductance rising area, otherwise can produce negative torque.Because rotor is the reaction equation structure, only need unipolar converter.But, the switched reluctance motor winding mutual inductance is very little, can not utilize the winding mutual inductance coupling that energy is transferred to next work phase, the phase current of switched reluctance motor does not have the natural zero-crossing point, if use the converter of unipolarity output, must force commutation, this afterflow mode is unfavorable for the performance of switch magnetic-resistance motor system performance.
Three, summary of the invention
1, goal of the invention: the purpose of this invention is to provide a kind of switched reluctance motor basic structure that do not change, can quicken commutation process, improve the commutation performance, improve the three-switch type power converter of switched reluctance motor power output.
2, technical scheme: the present invention utilizes the three-switch type power converter that increases a gate-controlled switch device and two diodes formation the present invention propositions between the coil of the every phase winding series connection of motor on the basis of existing conventional switch reluctance motor asymmetrical half-bridge formula power inverter main circuit.Every circuitry phase of existing asymmetrical half-bridge formula power inverter comprises two gate-controlled switch devices and two fly-wheel diodes, the gate-controlled switch device is connected with motor coil, the negative electrode of a fly-wheel diode links to each other with positive source, and anode is connected between gate-controlled switch device and the motor coil; The anode of another fly-wheel diode links to each other with power cathode, and negative electrode is connected between gate-controlled switch device and the motor coil.Of the present inventionly between the motor coil of two series connection, increased a gate-controlled switch device, and between these gate-controlled switch device two ends and positive source and negative pole, add a diode respectively, the negative electrode of one of them diode links to each other with positive source, and anode is connected between motor coil and the additional gate-controlled switch device; The anode of another diode links to each other with power cathode, and negative electrode is connected between motor coil and the additional gate-controlled switch device, and two groups of coils in every phase winding are realized also by the control of additional gate-controlled switch device is guaranteed to make, the automatic conversion of connecting.Promptly in the gate-controlled switch break-over of device stage, the winding that ordinary tap reluctance motor coil is composed in series still presents series connection, then change into the commutation voltage of state in parallel when significantly improving the motor windings afterflow in gate-controlled switch device off-phases, improve the commutation effect.
3, beneficial effect: advantage of the present invention is: the back-pressure at the winding two ends that have been multiplied when the motor windings afterflow, add the speed motor commutation process, improved the commutation performance, increased power output, effectively reduced torque pulsation, improve efficient, can also reduce the switched reluctance machines radial load effectively simultaneously, can reach the effect that reduces to vibrate, reduce noise.
Four, description of drawings
Fig. 1 is switched reluctance motor three switching power converters one circuitry phase schematic diagrams;
Fig. 2 is ordinary tap reluctance motor asymmetrical half-bridge formula power inverter one a phase main circuit schematic diagram;
Fig. 3 is switched reluctance machines one phase winding (L1, a L2 two parts coil) schematic diagram;
Fig. 4 is switched reluctance motor coil inductance, current curve schematic diagram.
Fig. 5 is switched reluctance motor coil inductance, the current curve schematic diagram that adopts three-switch type power converter;
Five, embodiment
As shown in Figure 1, every circuitry phase of switched reluctance motor three switching power converters comprises two switch elements and two diodes, switch element S
1With motor coil L
1Series connection, switch element S
2With motor coil L
2Series connection, the negative electrode of diode D1 links to each other with positive source, switch element S
2With motor coil L
2Between; The anode of diode D2 links to each other with power cathode, and negative electrode is connected in switch element S
3With motor coil L
1Between, in the motor coil L of two series connection
1And L
2Between the series connection gate-controlled switch device S
3, and at this gate-controlled switch device S
3Add a diode D between two ends and positive source and the negative pole respectively
3, D
4As booster diode, diode D wherein
3Negative electrode link to each other with positive source, anode is connected in motor coil L
1With gate-controlled switch device S
3Between; Diode D
4Anode link to each other with power cathode, negative electrode is connected in motor coil L
2With gate-controlled switch device S
3Between.When S1, S2, S3 conducting simultaneously, power supply is powered to motor coil, and the winding current path is power supply U+ → S1 → L1 → S3 → L2 → S2 → power cathode, and the motor windings series connection outwards provides torque; When S1, S2, S3 turn-off, the motor coil parallel connection, with energy feedback power, electric current follows power cathode → D2 → L1 → D3 → positive source and power cathode → D4 → L2 → D1 → two paths in parallel of positive source to sub-power supply feedback electric energy.
As shown in Figure 3, be that example describes with three-phase 6/4 configuration switches reluctance motor.Stator and rotor are salient pole teeth groove structure among the figure, stator tooth is provided with concentrated winding, rotor does not have winding, when rotor-position changes, the magnetic resistance of each phase magnetic circuit and the inductance of phase winding also change thereupon, is coil axis (stator tooth axis) and rotor dead in line location definition θ=0 °, and this position phase inductance is minimum value L
MinIt is θ to define stator phase winding axis and rotor tooth axis coincidence position again
m, inductance has maximum L at that time
MaxShown in the figure is exactly that phase inductance L (θ) is with rotor tooth elongation θ
rThe relation curve that changes for the cycle.From switched reluctance motor electric operation mechanism, usually, at motor coil inductance rising area (0～θ
mBetween the zone, as θ in the accompanying drawing 4
1The position) S1, S2 conducting in the control accompanying drawing 2, power supply is powered to motor windings, and the motor coil electric current follows positive source → S1 → L1 → L2 → S2 → power cathode path change; At motor coil inductance decline district (θ
m～θ
rBetween the zone, as θ in the accompanying drawing 4
2The position) S1, S2 turn-off in the control chart 2, and at this moment, motor is converted into electric energy with magnetic energy and feeds back to power supply, and the motor coil electric current follows power supply U-→ D2 → L1 → L2 → D1 → positive source path change, and waveform as shown in Figure 4.The defective of this scheme is that motor forces the commutation time long, and produces negative torque in inductance decline district, and the system of influence exerts oneself.Under the prerequisite that does not change switched reluctance motor basic structure, the new topology of the main circuit of the three-switch type power converter of present embodiment guarantees just can realize the motor windings string by the simple control to additional gate-controlled switch device, conversion in parallel, promptly motor windings is powered the stage at power supply, the winding that ordinary tap reluctance motor coil is composed in series can present series connection, then be converted to state in parallel in the winding commutation stage, work as S1, S2, during S3 conducting simultaneously, power supply is powered to motor coil, the winding current path is positive source → S1 → L1 → S3 → L2 → S2 → power cathode, the motor windings series connection outwards provides torque; When S1, S2, S3 turn-off, the motor coil parallel connection, with energy feedback power, electric current follows power cathode → D2 → L1 → D3 → positive source and power cathode → D4 → L2 → D1 → two paths in parallel of positive source to the power supply feedback electric energy.The current waveform of motor coil can find out obviously that the commutation performance has obtained very big improvement as shown in Figure 5.
Claims (1)
1, a kind of three-switch type power converter, its every circuitry phase comprises two switch element (S
1, S
2) and two diodes (D1, D2), switch element (S
1) and motor coil (L
1) series connection, switch element (S
2) and motor coil (L
2) series connection, the negative electrode of diode (D1) links to each other with positive source, and anode is connected in switch element (S
2) and motor coil (L
2) between; The anode of diode (D2) links to each other with power cathode, and negative electrode is connected in switch element (S
3) and motor coil (L
1) between, it is characterized in that every circuitry phase of this three-switch type power converter is at the motor coil (L of two series connection
1) and (L
2) between the series connection a gate-controlled switch device (S
3), and at this gate-controlled switch device (S
3) add a diode (D respectively between two ends and positive source and the negative pole
3), (D
4) as booster diode, diode (D wherein
3) negative electrode link to each other with positive source, anode is connected in motor coil (L
1) and gate-controlled switch device (S
3) between; Diode (D
4) anode link to each other with power cathode, negative electrode is connected in motor coil (L
2) and gate-controlled switch device (S
3) between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610039335XA CN100464495C (en) | 2006-04-06 | 2006-04-06 | Three-switch type power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610039335XA CN100464495C (en) | 2006-04-06 | 2006-04-06 | Three-switch type power converter |
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| Publication Number | Publication Date |
|---|---|
| CN1848665A true CN1848665A (en) | 2006-10-18 |
| CN100464495C CN100464495C (en) | 2009-02-25 |
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ID=37078071
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610039335XA Expired - Fee Related CN100464495C (en) | 2006-04-06 | 2006-04-06 | Three-switch type power converter |
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| Country | Link |
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| CN (1) | CN100464495C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946221A (en) * | 2012-11-13 | 2013-02-27 | 江苏科技大学 | Device and method for shortening phase changing time of brushless direct current motor |
| CN106100244A (en) * | 2016-06-14 | 2016-11-09 | 广东明阳龙源电力电子有限公司 | A kind of switched reluctance machines power circuit |
| CN107070355A (en) * | 2017-03-23 | 2017-08-18 | 广东美的制冷设备有限公司 | Speed-adjusting circuit of alternating and air conditioner |
| CN107154769A (en) * | 2017-03-23 | 2017-09-12 | 广东美的制冷设备有限公司 | Speed-adjusting circuit of alternating and air conditioner |
| CN107332222A (en) * | 2017-07-28 | 2017-11-07 | 尹向阳 | One kind is applied to powerful dc switch arc-control device |
| CN113131804A (en) * | 2021-04-21 | 2021-07-16 | 郑州大学 | Three-switch converter topology and control strategy for switched reluctance motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9608216D0 (en) * | 1996-04-19 | 1996-06-26 | Switched Reluctance Drives Ltd | Converter circuit for a polyphase switched inductive load |
| CN2266219Y (en) * | 1996-04-30 | 1997-10-29 | 李哲生 | Reluctance-type motor with secondary armature winding |
| CN1242544C (en) * | 2001-10-10 | 2006-02-15 | 乐金电子(天津)电器有限公司 | Switch reluctance machine drive |
| GB0312848D0 (en) * | 2003-06-04 | 2003-07-09 | Switched Reluctance Drives Ltd | Rotor position detection of a switched reluctance drive |
-
2006
- 2006-04-06 CN CNB200610039335XA patent/CN100464495C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946221A (en) * | 2012-11-13 | 2013-02-27 | 江苏科技大学 | Device and method for shortening phase changing time of brushless direct current motor |
| CN106100244A (en) * | 2016-06-14 | 2016-11-09 | 广东明阳龙源电力电子有限公司 | A kind of switched reluctance machines power circuit |
| CN107070355A (en) * | 2017-03-23 | 2017-08-18 | 广东美的制冷设备有限公司 | Speed-adjusting circuit of alternating and air conditioner |
| CN107154769A (en) * | 2017-03-23 | 2017-09-12 | 广东美的制冷设备有限公司 | Speed-adjusting circuit of alternating and air conditioner |
| CN107154769B (en) * | 2017-03-23 | 2019-07-19 | 广东美的制冷设备有限公司 | Speed-adjusting circuit of alternating and air conditioner |
| CN107332222A (en) * | 2017-07-28 | 2017-11-07 | 尹向阳 | One kind is applied to powerful dc switch arc-control device |
| WO2019019602A1 (en) * | 2017-07-28 | 2019-01-31 | 广州金升阳科技有限公司 | Direct current switch arc-extinguishing device suitable for high power |
| CN107332222B (en) * | 2017-07-28 | 2020-09-15 | 尹向阳 | Direct current switch arc extinguishing device suitable for high power |
| CN113131804A (en) * | 2021-04-21 | 2021-07-16 | 郑州大学 | Three-switch converter topology and control strategy for switched reluctance motor |
| CN113131804B (en) * | 2021-04-21 | 2022-07-26 | 郑州大学 | Three-switch converter topology and control strategy for switched reluctance motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100464495C (en) | 2009-02-25 |
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Granted publication date: 20090225 Termination date: 20100406 |